JPH1119812A - Drill - Google Patents

Drill

Info

Publication number
JPH1119812A
JPH1119812A JP10118697A JP11869798A JPH1119812A JP H1119812 A JPH1119812 A JP H1119812A JP 10118697 A JP10118697 A JP 10118697A JP 11869798 A JP11869798 A JP 11869798A JP H1119812 A JPH1119812 A JP H1119812A
Authority
JP
Japan
Prior art keywords
drill
shank
chip
cooling passages
chip groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10118697A
Other languages
Japanese (ja)
Inventor
Jens Hamberg
ハンベルグ ジェンス
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seco Tools AB
Original Assignee
Seco Tools AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seco Tools AB filed Critical Seco Tools AB
Publication of JPH1119812A publication Critical patent/JPH1119812A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/0486—Drills for trepanning with lubricating or cooling equipment
    • B23B51/0493—Drills for trepanning with lubricating or cooling equipment with exchangeable cutting inserts, e.g. able to be clamped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/04—Angles, e.g. cutting angles
    • B23B2251/043—Helix angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/12—Cross sectional views of the cutting edges
    • B23B2251/125—Rounded cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/40—Flutes, i.e. chip conveying grooves
    • B23B2251/408—Spiral grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
    • Y10T408/455—Conducting channel extending to end of Tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/905—Having stepped cutting edges
    • Y10T408/906—Axially spaced
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
    • Y10T408/9097—Spiral channel

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)

Abstract

PROBLEM TO BE SOLVED: To sufficiently transfer the cutting chips by extending cooling passages straight along the almost length of a shank in parallel with the center axis of the shank. SOLUTION: Cooling passages 30, 32 travel in parallel with each other along the almost length of a shank 12, and similarly travel in a holder 16 at the same distance separated from the center axis 20. Both the cooling passages 30, 32 are deflected before they are opened in an end 14 formed with a first chip. They are deflected so that the cooling passages 30, 32 do not hinder a cutting insertion tool 22 or a fixing means thereof at a stage, in which the cooling passages 30, 32 are ended at the first chip formed end 14. The cooling passage 32 is opened in a surface in the periphery of the shank 12. Both the cooling passages 30, 32 do not hinder the chip grooves 26, 28 over the full length of the shank 12.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、ドリル、好ましく
は切り屑を除去する機械加工用のドリルであって、少な
くとも２つの切れ刃をもつ第１のチップ形成端部と第２
の反対の端部とをもつシャンクと、シャンクのチップ形
成端部から反対の端部へと延びている２つの切り屑溝
と、ドリルのシャンクを通って、第１のチップ形成端部
で終る２つの冷却通路とを含んでいるドリルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drill, preferably a machining drill for removing chips, comprising a first tip forming end having at least two cutting edges and a second tip forming end.
A shank having an opposite end, two chip grooves extending from the tip forming end of the shank to the opposite end, and passing through the shank of the drill and ending at a first tip forming end. A drill including two cooling passages.

【０００２】[0002]

【従来の技術】前述の型のドリルは、切り屑を除去する
機械加工に、特に金属の加工品の穴あけに用いられる。
機械加工中、ドリルのシャンクのチップ形成端部で切り
屑が作られ、形成された切り屑は、シャンクのチップ形
成端部からドリルのシャンクの反対の端部まで移送され
る。この移送は切り屑溝により行われる。2. Description of the Prior Art Drills of the aforementioned type are used for machining to remove chips, especially for drilling metal workpieces.
During machining, chips are produced at the tip forming end of the shank of the drill and the formed chips are transferred from the tip forming end of the shank to the opposite end of the shank of the drill. This transfer is performed by a chip groove.

【０００３】中央の差込み工具の切り屑溝の深さを増加
するために、ドリルの構造が、ドリルのシャンクの一部
の長さに沿って延びている１つの中央の冷却通路を、ド
リルのシャンクの全長に沿って走行している２つの冷却
通路に代えられている。この公知のねじれドリルへの適
用では、冷却通路は、ドリルのシャンクを螺旋状に走行
しており、これにより、冷却通路が螺旋状に走っている
切り屑溝間に、例えば冷却通路が切り屑溝を妨害しない
で設けられている。[0003] To increase the depth of the chip flutes of the central insert, the structure of the drill includes one central cooling passage extending along the length of a portion of the shank of the drill. It has been replaced by two cooling passages running along the entire length of the shank. In this known twist drill application, the cooling passage runs helically on the shank of the drill, so that between the chip grooves where the cooling passage runs helically, for example, the cooling passage is chipped. It is provided without obstructing the groove.

【０００４】米国特許第５，５０９，７６１号により、
２つの直線の冷却通路がシャンクと切り屑溝との全軸方
向長さに沿って走行しているドリルは、従来公知であ
る。これらの両方の直線の冷却通路は、螺旋状の切り屑
溝を妨害しないために、ドリルの中心軸に対し一定の傾
きを有している。According to US Pat. No. 5,509,761,
Drills in which two straight cooling passages run along the entire axial length of the shank and the chip groove are known in the art. Both of these straight cooling passages have a constant inclination with respect to the central axis of the drill so as not to obstruct the spiral chip groove.

【０００５】[0005]

【発明が解決しようとする課題】本発明の目的は、切り
屑溝内の切り屑の十分な移送が、冷却通路を経て供給さ
れ、切り屑溝を経て戻される冷却媒体、好ましくは冷媒
によって行われるドリルを簡単に製造できる前述の型の
ドリルを提供することである。本発明の別の目的は、冷
却通路と切り屑溝の構造が、ドリルの強度が公知のドリ
ルと比較してプラスに影響するようにされていることで
ある。SUMMARY OF THE INVENTION It is an object of the present invention to provide for a sufficient transport of chips in a chip groove to be effected by a cooling medium, preferably a refrigerant, supplied via a cooling passage and returned through the chip groove. It is an object of the present invention to provide a drill of the type described above in which a drill can be easily manufactured. Another object of the invention is that the structure of the cooling passages and the chip grooves is such that the strength of the drill has a positive effect compared to known drills.

【０００６】[0006]

【課題を解決するための手段】本発明の目的は、特許請
求の範囲に記載されているような特徴を具備するドリル
によって解決される。SUMMARY OF THE INVENTION The object of the invention is solved by a drill having the features as set out in the claims.

【０００７】[0007]

【発明の実施の形態】本発明の実施の形態を、添付の図
面を参照して以下に説明する。図１に示されるドリル１
０は、第１のチップ形成端部１４を有するシャンク１２
と、このシャンク１２の第２の反対の端部１８に結合さ
れた保持具１６とを具備している。保持具１６は工作機
械のアダプタ（図示されていない）に差し込まれるよう
になっている。シャンク１２と保持具１６とは、共通の
縦方向の中心軸２０を有し、これはまたドリル１０の回
転軸でもある。ドリル１０の回転方向は図３に矢印２１
で示されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. Drill 1 shown in Figure 1
0 is a shank 12 having a first tip forming end 14
And a retainer 16 coupled to a second opposite end 18 of the shank 12. The holder 16 is adapted to be inserted into an adapter (not shown) of the machine tool. The shank 12 and the holder 16 have a common longitudinal central axis 20, which is also the axis of rotation of the drill 10. The direction of rotation of the drill 10 is indicated by an arrow 21 in FIG.
Indicated by

【０００８】シャンク１２の第１のチップ形成端部１４
には、中央の差込み工具２２と周辺の差込み工具２４
（部分的にかくれている）とが設けられている。好まし
くは切削差込み工具２２，２４は交換可能である。シャ
ンク１２は第１のチップ形成端部１４から保持具１６に
結合されている第２の反対の端部面１８まで、実質的に
一定の直径Ｄを有している。The first chip forming end 14 of the shank 12
The center insert 22 and the peripheral insert 24
(Partially hidden). Preferably, the cutting inserts 22, 24 are replaceable. The shank 12 has a substantially constant diameter D from a first tip forming end 14 to a second opposite end surface 18 that is coupled to a retainer 16.

【０００９】示された実施の形態においては、唯一つ２
６が図１に示されている２つの切り屑溝２６，２８は、
第１のチップ形成端部１４から保持具１６まで螺旋状に
延びており、そこで切り屑溝２６，２８は無くなって終
っている。図１に示されるように切り屑溝２６は一定の
ねじれ角度Ｖを有している。前記角度Ｖの好ましい値
は、２°〜５°の範囲内にある。図１に示されていない
切り屑溝２８は、大きい方のねじれ角度Ｖにぴったりの
角度を有している。この関連において、本発明の範囲内
で図３の矢印２１に見られるように同じ回転方向で負の
ねじれ角度をもつものも可能である。負のねじれ角度
は、ドリル１０の振動の減衰に有利である。In the illustrated embodiment, only one
The two chip grooves 26, 28, 6 of which are shown in FIG.
It extends helically from the first tip forming end 14 to the holder 16, where the chip grooves 26, 28 end. As shown in FIG. 1, the chip groove 26 has a constant twist angle V. The preferred value of the angle V is in the range of 2 ° to 5 °. The chip flutes 28 not shown in FIG. 1 have an angle exactly equal to the larger twist angle V. In this connection, it is possible within the scope of the invention to have a negative twist angle in the same direction of rotation, as can be seen from arrow 21 in FIG. A negative torsion angle is advantageous for damping the vibration of the drill 10.

【００１０】各々の切り屑溝２６，２８は、シャンク１
２の全長Ｌに沿って実質的に一定の断面形状を有してい
る。[0010] Each of the chip grooves 26 and 28 is provided with a shank 1.
2 has a substantially constant cross-sectional shape along the entire length L.

【００１１】本発明によるドリル１０は、好ましくはシ
ャンクの長さＬがシャンクの直径Ｄ（図１を参照）に対
し、５×Ｄ≧Ｌ≧３×Ｄの関係にあるようなドリルのた
めに意図されている。適切なねじれ角度Ｖが上記と同一
の範囲内で選択されるならば、約３０°の切り屑溝２
６，２８の螺旋状の捩れが、軸１２の全長において得ら
れる。The drill 10 according to the invention is preferably for drills in which the length L of the shank is in relation to the diameter D of the shank (see FIG. 1) such that 5 × D ≧ L ≧ 3 × D. Is intended. If a suitable twist angle V is selected within the same range as above, a chip groove 2 of about 30 °
6,28 helical twists are obtained over the entire length of the shaft 12.

【００１２】図２〜６に示されるような２つの冷却通路
３０，３２が、シャンク１２内を走行しており、前記冷
却通路３０，３２は、保持具１６の自由端からシャンク
１２をずっと通ってチップ形成端部２０まで延びてお
り、そこで開口している。示された例においては、冷却
通路３０，３２は中心軸２０と平行で、シャンク１２の
長さＬの大部分に沿ってと同様に保持具１６内でも中心
軸２０から同じ距離だけ離れて走行している。図４と５
に最もよく示されるように、冷却通路３０，３２の偏向
が、第１のチップ形成端部１４に開口する前に与えられ
る。この偏向の理由は、冷却通路３０，３２が第１のチ
ップ形成端部１４で終る際に、それらが切削差込み工具
２２，２４又はそれらの固定手段を妨害しないようにす
るためである。冷却通路３２はシャンク１２の周辺の表
面にもまた開口している。図２と３に示される断面か
ら、切り屑溝２６，２８が螺旋状であるという事実にも
かかわらず、冷却通路３０，３２はシャンク１２の全長
に沿って切り屑溝２６，２８を妨害していないことは明
らかである。このことは、保持具１６に即隣接している
断面II−IIと、チップ形成端部１４に隣接している断面
III −III とを並べることによって分かる。このこと
は、シャンク１２の全長Ｌの全螺旋状の捩れが約３０°
だけであるとの背景が当然にある。螺旋状の捩れは、図
２と３の切り屑溝２８の検討によって最も明瞭になり、
ここでは全螺旋状の捩れは小さい。この関連で、シャン
ク長Ｌとシャンク径Ｄとが５×Ｄ≧Ｌ≧３×Ｄの割合を
もつドリルに対してもまた、切り屑溝２６，２８内の切
り屑の移送のどんな計測可能な低下を記録することな
く、約３０°であるシャンクの全長にわたる螺旋状の捩
れで十分であるということを、驚いたことにそれは示し
ている。この発見により、冷却通路３０，３２は真直ぐ
に又は直線的に、かつシャンク１２の実質的に全長Ｌに
沿って中心軸１８と平行に走行することが出来た。この
ことが、本発明によるドリル１０の製造にとって顕著な
利点である。Two cooling passages 30, 32 as shown in FIGS. 2 to 6 run in the shank 12, said cooling passages 30, 32 passing through the shank 12 from the free end of the holder 16. And extends to the chip forming end 20 where it is open. In the example shown, the cooling passages 30, 32 are parallel to the central axis 20 and run the same distance from the central axis 20 in the holder 16 as along most of the length L of the shank 12. doing. Figures 4 and 5
The deflection of the cooling passages 30, 32 is provided before opening to the first chip forming end 14, as best shown in FIG. The reason for this deflection is that when the cooling passages 30, 32 terminate at the first tip forming end 14, they do not obstruct the cutting inserts 22, 24 or their fixing means. The cooling passages 32 also open to the peripheral surface of the shank 12. From the cross-sections shown in FIGS. 2 and 3, despite the fact that the chip grooves 26, 28 are helical, the cooling passages 30, 32 obstruct the chip grooves 26, 28 along the entire length of the shank 12. Obviously not. This means that the cross section II-II immediately adjacent to the holder 16 and the cross section adjacent to the tip forming end 14
It can be seen by arranging III-III. This means that the total helix of the entire length L of the shank 12 is about 30 °.
There is naturally a background that it is only. The helical twist is most evident by examining the chip groove 28 in FIGS.
Here, the whole spiral twist is small. In this connection, for a drill with a shank length L and a shank diameter D having a ratio of 5 × D ≧ L ≧ 3 × D, any measurable chip transfer in the chip grooves 26, 28 is also possible. It surprisingly shows that a helical twist over the entire length of the shank, which is about 30 °, is sufficient without recording a drop. This finding allowed the cooling passages 30, 32 to run straight or straight and parallel to the central axis 18 along substantially the entire length L of the shank 12. This is a significant advantage for the manufacture of the drill 10 according to the invention.

【００１３】図２に見られるように、シャンク１２の中
心軸２０から一定の距離だけ離れて走行している冷却通
路３０，３２を有することによって、ドリル１０のウェ
ブ３４は、ドリル１０の堅固性にとって有利であるその
ままの状態にある。ドリル１０のウェブの厚さは、図２
に３５で示されている。好ましくはウェブの厚さ３５
は、シャンク径Ｄの約２２％である。図２，３と６とか
らドリル１０のウェブ３４が、ドリル１０の中心軸１８
に対してずれた位置にあり、このことが、中央の差込み
工具２２の切り屑溝２６の深さが増加する一方で、周辺
の差込み工具２４の切り屑溝２８の深さが対応する程度
減らされることに頼っていることは明らかである。図６
に見られるように、中央の差込み工具２２からの切り屑
が円形状をしているのに対し、周辺の差込み工具２４か
らの切り屑が台形形状をしていることは、一般に公知で
ある。切り屑の寸法は、チップ形成端部の切削幾何学形
状に実質的に依存しており、それ故に或るドリルが発生
するそれぞれの切り屑の最大寸法がどれくらいかを経験
上から明らかにすることができる。この知識は切り屑溝
２２，２４の寸法を決めるときに用いられる。As can be seen in FIG. 2, by having cooling passages 30, 32 running a distance away from the central axis 20 of the shank 12, the web 34 of the drill 10 makes the rigidity of the drill 10 rigid. In a state that is advantageous to The thickness of the web of the drill 10 is shown in FIG.
At 35. Preferably web thickness 35
Is about 22% of the shank diameter D. From FIGS. 2, 3 and 6, the web 34 of the drill 10 is
, Which means that the depth of the chip groove 26 of the central insert 22 is increased while the depth of the chip groove 28 of the peripheral insert 24 is correspondingly reduced. It is clear that they rely on being done. FIG.
It is generally known that the chips from the center insert 22 have a circular shape, while the chips from the peripheral insert 24 have a trapezoidal shape, as seen in FIG. The size of the chips is substantially dependent on the cutting geometry of the tip forming end, so it is empirical to determine what the maximum size of each chip a given drill will produce Can be. This knowledge is used when sizing the chip grooves 22,24.

【００１４】図６に示されるように、切り屑溝２６が、
中央の差込み工具２２からの円形状の切り屑を切り屑溝
２６内に入れることができる深さを有することが重要で
ある。周辺の差込み工具２４のための切り屑溝２８内で
の横断面領域は、周辺の差込み工具２４からの台形形状
の切り屑に最大限可能な程度まで合わされている。図２
に最もよく示されるように切り屑溝２８は、実質的に平
坦な底面３６と、互いに実質的に平行な、平坦な側壁と
を有している。側壁３８と底面３６とは、なめらかに円
くされた移行部により互いにつながっている。切り屑溝
２８の幅Ｂとシャンク１２の直径Ｄとの関係は、好まし
くはＢが直径Ｄの約半分、例えばＢ≒０．５×Ｄであ
る。図６の検討により、印象的な方法では切り屑溝２８
の断面は、切り屑の台形形状、特に切り屑溝２８の平行
な側壁に合わされ、これによりシャンク１２の周辺で最
小限の物のみが切り屑溝２４の領域で取り除かれ、ドリ
ル１０の堅固性に有利になっていることが分かる。As shown in FIG. 6, the chip grooves 26
It is important to have a depth that allows circular chips from the center insert 22 to enter the chip grooves 26. The cross-sectional area in the chip groove 28 for the peripheral insert 24 is matched to the maximum extent possible with trapezoidal chips from the peripheral insert 24. FIG.
As best shown in FIG. 2, the chip groove 28 has a substantially flat bottom surface 36 and flat side walls substantially parallel to each other. The side wall 38 and the bottom surface 36 are connected to each other by a smoothly rounded transition. The relationship between the width B of the chip groove 28 and the diameter D of the shank 12 is preferably such that B is about half of the diameter D, for example, B ≒ 0.5 × D. According to a review of FIG.
Is adapted to the trapezoidal shape of the chip, in particular the parallel side walls of the chip groove 28, so that only a minimum of material around the shank 12 is removed in the area of the chip groove 24 and the rigidity of the drill 10 It turns out that it is advantageous.

【図面の簡単な説明】[Brief description of the drawings]

【図１】図１は、本発明によるドリルの側面図である。FIG. 1 is a side view of a drill according to the present invention.

【図２】図２は、図１の線II−IIにおける断面図であ
る。FIG. 2 is a sectional view taken along line II-II in FIG. 1;

【図３】図３は、図１の線III −III における断面図で
ある。FIG. 3 is a sectional view taken along line III-III in FIG. 1;

【図４】図４は、本発明におけるドリルのシャンクの上
面図である。FIG. 4 is a top view of the shank of the drill according to the present invention.

【図５】図５は、図４の線Ｖ−Ｖにおける断面図であ
る。FIG. 5 is a sectional view taken along line VV in FIG. 4;

【図６】図６は、切り屑の外形と穴の壁とが示されてい
る本発明によるドリルのシャンクの概略的な横断面図で
ある。FIG. 6 is a schematic cross-sectional view of a shank of a drill according to the invention, showing the contour of the chip and the wall of the hole.

【符号の説明】[Explanation of symbols]

１０…ドリル １２…シャンク １４…第１のチップ形成端部 １６…保持具 １８…第２の反対の端部 ２０…中心軸 ２２…中央の差込み工具 ２４…周辺の差込み工具 ２６，２８…切り屑溝 ３０，３２…冷却通路 ３４…ウェブ DESCRIPTION OF SYMBOLS 10 ... Drill 12 ... Shank 14 ... 1st chip formation end 16 ... Holder 18 ... 2nd opposite end 20 ... Center axis 22 ... Center insertion tool 24 ... Peripheral insertion tool 26, 28 ... Chips Grooves 30, 32: cooling passages 34: web

Claims (10)

【特許請求の範囲】[Claims] 【請求項１】 切り屑を除去する機械加工用のドリルで
あって、 縦方向長さ（Ｌ）と少なくとも２つの切れ刃をもつ第１
のチップ形成端部（１４）と第２の反対の端部（１８）
とを有するシャンク（１２）と、シャンク（１２）の第
１のチップ形成端部（１４）から反対の端部（１８）ま
で延びている２つの切り屑溝（２６，２８）と、ドリル
（１０）のシャンク（１２）を通って延び、第１のチッ
プ形成端部（１４）で終っている２つの冷却通路（３
０，３２）とを含んでいるドリルにおいて、 冷却通路（３０，３２）が、シャンク（１２）の長さ
（Ｌ）の大部分に沿って直線状に延び、シャンク（１
２）の中心軸（２０）に平行に走行しており、かつドリ
ル（１０）がねじれドリルであることを特徴とするドリ
ル。1. A machining drill for removing chips, comprising: a first drill having a longitudinal length (L) and at least two cutting edges;
Chip forming end (14) and a second opposite end (18)
A shank (12) having two chip grooves (26, 28) extending from a first tip forming end (14) of the shank (12) to an opposite end (18); and a drill ( 10) two cooling passages (3) extending through the shank (12) and terminating at the first tip forming end (14).
0, 32), wherein the cooling passages (30, 32) extend linearly along a majority of the length (L) of the shank (12),
2) A drill running parallel to the central axis (20) of (2) and wherein the drill (10) is a torsion drill. 【請求項２】 シャンク（１２）の長さ（Ｌ）の大部分
に沿って直線状に延びている冷却通路（３０，３２）が
中心軸（２０）から等しい距離だけ離れて設けられてい
ることを特徴とする請求項１に記載のドリル。2. Cooling passages (30, 32) extending linearly along most of the length (L) of the shank (12) are provided at equal distances from the central axis (20). The drill according to claim 1, wherein: 【請求項３】 チップ形成端部（１４）に最も近い領域
で、冷却通路（３０，３２）がシャンク（１２）の残り
の直線状の延長部からそれていることを特徴とする請求
項１又は２に記載のドリル。3. The cooling passage (30, 32) deviates from the remaining linear extension of the shank (12) in the region closest to the tip forming end (14). Or the drill according to 2. 【請求項４】 切り屑溝（２６，２８）が、２°〜５°
の範囲内のねじれ角度（Ｖ）を有していることを特徴と
する請求項１〜３のいずれか１項に記載のドリル。4. The chip groove (26, 28) is 2 ° to 5 °.
The drill according to any one of claims 1 to 3, wherein the drill has a twist angle (V) in the range of: 【請求項５】 シャンク（１２）の全長（Ｌ）に沿う切
り屑溝（２６，２８）の螺旋状の捩れが約３０°である
ことを特徴とする請求項４に記載のドリル。5. A drill according to claim 4, wherein the helical twist of the chip groove (26, 28) along the entire length (L) of the shank (12) is about 30 °. 【請求項６】 ドリル（１０）のウェブ厚さ（３５）
が、シャンクの直径（Ｄ）の約２２％であることを特徴
とする請求項１〜５に記載のドリル。6. The web thickness (35) of the drill (10).
Is about 22% of the diameter (D) of the shank. 【請求項７】 一方の切れ刃が中央の差込み工具（２
２）の一部であり、別の切れ刃が周辺の差込み工具（２
４）の一部であることを特徴とする請求項１〜６のいず
れか１項に記載のドリル。7. One of the cutting edges is a center insertion tool (2).
Another cutting edge that is part of 2)
The drill according to any one of claims 1 to 6, wherein the drill is a part of (4). 【請求項８】 中央の差込み工具（２２）の切り屑溝
（２６）が、部分的に円形の断面を有していることを特
徴とする請求項７に記載のドリル。8. Drill according to claim 7, wherein the chip groove (26) of the central insert (22) has a partially circular cross section. 【請求項９】 周辺の差込み工具（２４）の切り屑溝
（２８）が、実質的に平行な側壁を有していることを特
徴とする請求項７又は８に記載のドリル。9. Drill according to claim 7, wherein the chip groove (28) of the peripheral insert (24) has substantially parallel side walls. 【請求項１０】 周辺の差込み工具（２４）の切り屑溝
（２８）が、シャンク（１２）の直径（Ｄ）の半分に実
質的に一致している幅（Ｂ）を有することを特徴とする
請求項７〜９のいずれか１項に記載のドリル。10. The chip groove (28) of the peripheral insert (24) has a width (B) substantially corresponding to half the diameter (D) of the shank (12). The drill according to any one of claims 7 to 9, which performs the drilling.
JP10118697A 1997-04-30 1998-04-28 Drill Pending JPH1119812A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9701627-3 1997-04-30
SE9701627A SE512187C2 (en) 1997-04-30 1997-04-30 Drill

Publications (1)

Publication Number Publication Date
JPH1119812A true JPH1119812A (en) 1999-01-26

Family

ID=20406784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10118697A Pending JPH1119812A (en) 1997-04-30 1998-04-28 Drill

Country Status (7)

Country Link
US (1) US5947653A (en)
EP (1) EP0876868B1 (en)
JP (1) JPH1119812A (en)
KR (1) KR100540724B1 (en)
CN (1) CN1092554C (en)
DE (1) DE69817068T2 (en)
SE (1) SE512187C2 (en)

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US20100260558A1 (en) * 2007-12-06 2010-10-14 Mapal Fabrik Fur Prazisionswerkzeug4E Dr. Kress Kg Tool for the machining of workpieces
US8393832B2 (en) * 2007-12-06 2013-03-12 Mapal Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg Tool for the machining of workpieces
US10123850B2 (en) 2013-01-30 2018-11-13 Dentsply Sirona Inc. Instrument for drilling dental root canals
US9801696B2 (en) 2013-01-30 2017-10-31 Maillefer Instruments Holding Sárl Instrument for drilling dental root canals
US10058930B2 (en) 2013-04-03 2018-08-28 Kennametal Inc. Tool head for rotary cutting tool and rotary cutting tool including same
US9271740B2 (en) 2013-08-21 2016-03-01 Michael J. Scianamblo Precessional-motion bone and dental drilling tools and bone harvesting apparatus
US9277925B2 (en) * 2013-08-21 2016-03-08 Michael J. Scianamblo Precessional drilling and reaming
US20150063926A1 (en) * 2013-08-30 2015-03-05 Kennametal Inc. Indexable cutting insert with coolant delivery
US10052698B2 (en) 2013-10-15 2018-08-21 Kennametal Inc. Modular carrier tool and tool head
US10213845B2 (en) 2014-04-08 2019-02-26 Kennametal Inc. Rotary tool, in particular a drill, and a cutting head for said rotary tool
US10040132B2 (en) 2015-06-24 2018-08-07 Kennametal Inc. Rotary tool, in particular a drill for such a rotary tool
US9937567B2 (en) 2015-10-07 2018-04-10 Kennametal Inc. Modular drill
US10071430B2 (en) 2015-10-07 2018-09-11 Kennametal Inc. Cutting head, rotary tool and support for the rotary tool and for the accommodation of the cutting head
USD798922S1 (en) 2015-10-07 2017-10-03 Kennametal Inc. Cutting head for rotary drill
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US11565356B2 (en) 2017-07-13 2023-01-31 Kennametal Inc. Method for producing a cutting head
US10799958B2 (en) 2017-08-21 2020-10-13 Kennametal Inc. Modular rotary cutting tool
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US11911830B2 (en) 2019-06-13 2024-02-27 Kennametal India Ltd. Indexable drilling inserts

Also Published As

Publication number Publication date
EP0876868B1 (en) 2003-08-13
US5947653A (en) 1999-09-07
SE9701627L (en) 1998-10-31
CN1092554C (en) 2002-10-16
KR19980081837A (en) 1998-11-25
SE512187C2 (en) 2000-02-07
DE69817068T2 (en) 2004-06-09
EP0876868A1 (en) 1998-11-11
DE69817068D1 (en) 2003-09-18
CN1197709A (en) 1998-11-04
KR100540724B1 (en) 2006-03-23
SE9701627D0 (en) 1997-04-30

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